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Modified carbon nanotube and preparation method thereof

A carbon nanotube and nanotube technology, which is applied in the field of modified carbon nanotubes and their preparation, can solve the problems of damage to the graphite structure of carbon tubes and the reduction of excellent performance, and achieve the effects of improving dispersibility, high strength and high modulus.

Inactive Publication Date: 2014-01-01
SUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It can be seen from the above existing technologies that although the current modified carbon nanotube preparation technology achieves the purpose of modification in some aspects, it inevitably significantly damages the perfect graphite structure of carbon nanotubes, resulting in a decrease in their excellent performance.

Method used

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  • Modified carbon nanotube and preparation method thereof
  • Modified carbon nanotube and preparation method thereof
  • Modified carbon nanotube and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Preparation of hyperbranched polysiloxane modified polyaniline

[0036] Get 30mL dehydrated alcohol as solvent, add 23.6g 3-glycidyl etheroxypropyl trimethoxysilane to it, at room temperature, N 2 Under the conditions of protection and magnetic stirring, slowly add 2.0 g of HCl solution with a pH of 2 dropwise; after the dropwise addition, raise the temperature to 50°C and continue the reaction for 7 hours; after the reaction, carry out vacuum distillation to obtain a transparent and viscous of hyperbranched polysiloxanes. The weight average molecular weight was 7500. Its infrared spectrum is as figure 1 shown.

[0037] 0.9g aniline, 1.1g o-toluidine and 1.7g m-aminobenzenesulfonic acid were mixed respectively, and 150mL hydrochloric acid solution (0.2mol / L) was added in the mixture; 2Under protection and at 0-5°C, mechanically stir for 30 minutes. Subsequently, 100 mL of ammonium persulfate (0.3 mol / L) solution was added dropwise and vigorously stirred. After ...

Embodiment 2

[0055] 1. Preparation of hyperbranched polysiloxane modified polyaniline

[0056] Prepare hyperbranched polysiloxane-modified polyaniline according to the technical scheme of embodiment 1.

[0057] 2. Preparation of modified carbon nanotubes

[0058] Add 1g of carbon nanotubes and 0.05g of hyperbranched polysiloxane-modified polyaniline into 50mL of dimethyl sulfoxide, stir at 25°C and sonicate for 20min, add 100mL of methanol to precipitate, filter and wash with suction, and °C for 24 hours in vacuum to obtain modified carbon nanotubes. Its X-ray diffraction spectrum, Raman spectrum, scanning electron microscopy and conductivity are as follows Figure 9 , 10 , 11 and 12.

Embodiment 3

[0060] 1. Preparation of hyperbranched polysiloxane modified polyaniline

[0061] Prepare hyperbranched polysiloxane-modified polyaniline according to the technical scheme of embodiment 1.

[0062] 2. Preparation of modified carbon nanotubes

[0063] Add 1g of carbon nanotubes and 0.2g of hyperbranched polysiloxane-modified polyaniline into 50mL of dimethyl sulfoxide, stir at 25°C and sonicate for 20min, add 100mL of methanol to precipitate, filter and wash with suction, and °C for 24 hours in vacuum to obtain modified carbon nanotubes. Its X-ray diffraction spectrum, Raman spectrum, and scanning electron microscopy are as follows Figure 9 , 10 , 11 shown.

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Abstract

The invention relates to a modified carbon nanotube and a preparation method thereof. The preparation method comprises the following steps: dissolving polyaniline in dimethylsulfoxide, dropwisely adding hyperbranched polysiloxane containing epoxy group, and adding hydrochloric acid to obtain hyperbranched-polysiloxane modified polyaniline; and adding the hyperbranched-polysiloxane modified polyaniline and carbon nanotube into dimethylsulfoxide, precipitating in methanol, carrying out vacuum filtration, and washing to obtain the modified carbon nanotube. The hyperbranched-polysiloxane modified polyaniline conductive layer is coated on the surface of the carbon nanotube, and the content of the coating layer can be regulated to control the conductivity of the modified carbon nanotube, thereby providing possibility for preparing conductive and dielectric materials with functions of high dielectric constant, low dielectric loss and the like as well as regulating and controlling properties. The hyperbranched polysiloxane contains epoxy, hydroxy and other active groups, and thus, lays favorable foundation for research and development of modified carbon nanotube-resin composite and novel functional materials. The modified carbon nanotube provided by the invention has the characteristics of wide preparation method applicability and simple operating technique.

Description

technical field [0001] The invention relates to a modified carbon nanotube and a preparation method thereof. Background technique [0002] Carbon nanotubes have a large aspect ratio and are a one-dimensional quantum material with a special structure. They are lightweight, have a perfect hexagonal structure, and have high modulus and high strength. They are considered to be ideal enhancements for multifunctional materials. Its application in many fields has attracted the attention of scientists from all over the world. Among them, the composite of carbon nanotubes and polymers has become an important application form of carbon nanotubes. In recent decades, scholars at home and abroad have carried out a lot of research, and the results show that the dispersion of carbon nanotubes is the key factor affecting whether their excellent performance can be fully exerted. However, the extremely easy aggregation of carbon nanotubes determines that it is difficult to obtain good dispe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/06C08K7/00C08K3/04C08G81/00C08G73/02C09C1/44C09C3/12
Inventor 梁国正强志翔顾嫒娟张志勇袁莉
Owner SUZHOU UNIV
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